THERMODYNAMIC DESIGN OF 10 KW BRAYTON CRYOCOOLER FOR HTS CABLE

被引：20
|
作者：
Chang, H. M. [1 ]
Park, C. W. [1 ]
Yang, H. S. [2 ]
Sohn, S. H. [2 ]
Lim, J. H. [2 ]
Oh, S. R. [2 ]
Hwang, S. D. [2 ]
机构：
[1] Hongik Univ, Seoul 121791, South Korea
[2] KEPCO Res Inst, Daejeon 305760, South Korea
来源：
ADVANCES IN CRYOGENIC ENGINEERING, VOLS 57A AND 57B | 2012年 / 1434卷
关键词：
HTS cable; Brayton cycle; cryocooler; thermodynamics; liquid nitrogen;
D O I：
10.1063/1.4707099
中图分类号：
O59 [应用物理学];
学科分类号：
摘要：
Thermodynamic design of Brayton cryocooler is presented as part of an ongoing governmental project in Korea, aiming at 1 km HTS power cable in the transmission grid. The refrigeration requirement is 10 kW for continuously sub-cooling liquid nitrogen from 72 K to 65 K. An ideal Brayton cycle for this application is first investigated to examine the fundamental features. Then a practical cycle for a Brayton cryocooler is designed, taking into account the performance of compressor, expander, and heat exchangers. Commercial software (Aspen HYSYS) is used for simulating the refrigeration cycle with real fluid properties of refrigerant. Helium is selected as a refrigerant, as it is superior to neon in thermodynamic efficiency. The operating pressure and flow rate of refrigerant are decided with a constraint to avoid the freezing of liquid nitrogen.
引用
收藏
页码：1664 / 1671
页数：8
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